The Red Fort, or Lal Qila, is a UNESCO World Heritage Site located in Old Delhi, India. It was constructed by Mughal Emperor Shah Jahan between 1638 and 1648 as the palace fort of his capital, Shahjahanabad. The fort is renowned for its blend of Indo-Islamic and Mughal architectural styles, featuring red sandstone walls and white marble decorations. It served as the residence of Mughal emperors for nearly two centuries until 1857. The complex includes several notable structures, such as the Hall of Public Audience (Diwan-i-Am) and the Hall of Private Audience (Diwan-i-Khas), which showcase intricate marble work and ornate decorations. The fort's main entrance, the Lahori Gate, leads to a covered shopping area known as Chatta Chowk. The Red Fort is a symbol of India's rich cultural heritage and has played a significant role in the country's history, including serving as a backdrop for India's Independence Day celebrations.

Humayun's Tomb is a monumental mausoleum located in Delhi, India, built in the 1560s by Humayun's son, Emperor Akbar. It is renowned for its grand Mughal architecture, blending Persian and Indian styles. The tomb was the first garden-tomb on the Indian subcontinent, setting a precedent for future Mughal architectural innovations, including the Taj Mahal. The complex includes the main tomb, surrounded by a charbagh garden, which represents the four rivers of the Quranic paradise. The structure features a high, wide terraced platform with a double dome design, adorned with marble and red sandstone. The tomb houses over 150 Mughal family members, earning it the nickname "dormitory of the Mughals". Humayun's Tomb is a significant cultural and historical landmark, reflecting the synthesis of Persian and Indian architectural traditions. It was declared a UNESCO World Heritage Site in recognition of its architectural and historical importance

The Lotus Temple, officially known as the Bahá'í House of Worship, is located in the village of Bahapur, near Nehru Place in New Delhi. It was designed by Iranian architect Fariborz Sahba and completed in December 1986. The temple is famous for its flower-like shape, composed of 27 free-standing marble-clad "petals" arranged in clusters of three to form nine sides. This design reflects the Bahá'í emphasis on the number nine and the symbolic significance of the lotus flower in Indian culture, representing purity, spirituality, and peace The temple is open to all, regardless of religion, and serves as a place for meditation and prayer. It features a central hall with a capacity of up to 2,500 people and is surrounded by nine ponds and beautifully landscaped gardens. The Lotus Temple has received numerous architectural awards and attracts millions of visitors annually, making it one of the most visited buildings in the world

The Swaminarayan Akshardham Temple is a magnificent Hindu temple complex located on the banks of the Yamuna River in New Delhi. It was inaugurated on November 6, 2005, by Pramukh Swami Maharaj and is a tribute to Lord Swaminarayan, a revered figure in Hinduism. The complex is a marvel of modern architecture, blending traditional Indian designs with contemporary elements. It features a large temple made entirely of Rajasthani pink sandstone and Italian Carrara marble, with intricate carvings and sculptures depicting Hindu mythology and culture. The temple complex includes several attractions: Akshardham Mandir: The main temple, featuring a 43-meter high structure with 234 ornate pillars and nine domes. Exhibition Halls: These include Sahajanand Darshan (Hall of Values), Neelkanth Darshan (an IMAX film on Swaminarayan's life), and Sanskruti Darshan (a cultural boat ride). Abhishek Mandap: A place for ritual worship. Yogi Hriday Kamal: A beautiful lotus-shaped garden. Sahaj Anand: A multimedia water show. The temple is a significant cultural and spiritual destination, attracting millions of visitors annually. It is easily accessible via the Akshardham Metro Station on the Delhi Metro Blue Line.

India Gate is a 42-meter high sandstone arch located at the eastern end of Rajpath in New Delhi. Designed by Sir Edwin Lutyens, it was built as a memorial to the 70,000 Indian soldiers who lost their lives fighting for the British Army during World War I and the Afghan Wars. The foundation stone was laid in 1921 by the Duke of Connaught, and the monument was dedicated to the nation in 1931. The arch is surrounded by lush green lawns, making it a popular picnic spot. An eternal flame, Amar Jawan Jyoti, burns under the arch to commemorate soldiers who died in the Indo-Pakistani War of 1971. India Gate is dramatically floodlit at night, and the nearby fountains display colorful lights, enhancing its beauty. It is a significant landmark in New Delhi and a symbol of national pride, especially during Republic Day celebrations.